Viltrox Air AF 9mm F2.8 E 9mm
Sigma Art 17-40mm f/1.8 DC 40mm
What Buyers Say
Viltrox Air AF 9mm F2.8 E 9mm
The Viltrox lenses receive overwhelmingly positive feedback for their exceptional value, sharp image quality, and solid build. Users praise the fast apertures and autofocus performance, though some note issues with chromatic aberration in high-contrast scenes and noisy autofocus on certain models. Overall, these lenses are seen as a budget-friendly alternative that punches above their price point.
Pros
- Excellent value for money
- Sharp image quality wide open
- Solid metal construction
- Fast and accurate autofocus
- Pleasing bokeh
Cons
- Chromatic aberration in high contrast
- Noisy autofocus in video
- Slow autofocus in low light
- No weather sealing
- Front-heavy on small bodies
Sigma Art 17-40mm f/1.8 DC 40mm
The Sigma 17-40mm f/1.8 DC DN Art lens is overwhelmingly praised for its exceptional image quality, fast constant aperture, and compact internal zoom design. Users highlight its sharpness, lightweight build, and excellent autofocus performance, especially on crop-sensor mirrorless cameras like the Canon R7 and Fujifilm bodies. A few questions about compatibility with specific cameras and features like weather sealing and aperture ring are noted, but the overall sentiment is extremely positive.
Pros
- Exceptional image quality
- Fast constant f/1.8 aperture
- Compact internal zoom design
- Lightweight build
- Sharp and bright photos
Cons
- No weather sealing mentioned
- No manual aperture ring on some mounts
- Compatibility questions with full-frame cameras
- Expensive for some buyers
Scores
Specifications
| Viltrox Air AF 9mm F2.8 E 9mm | Sigma Art 17-40mm f/1.8 DC 40mm | |
|---|---|---|
| Optics | ||
| Type | prime | zoom |
| Focal Length Min | 9 mm | 17 mm |
| Focal Length Max | 9 mm | 40 mm |
| Elements | 13 | 17 |
| Groups | 11 | 11 |
| Aspherical Elements | 2 | 4★ |
| ED Elements | 3 | 4★ |
| Coating | HD multilayer nano coating | Super Multi-Layer Coating |
| Aperture | ||
| Max Aperture | f/16 | f/1.8 |
| Min Aperture | f/2.8 | f/1.8 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 7 | 11★ |
| Build | ||
| Mount | Sony E | Fujifilm X |
| Format | APS-C | APS-C |
| Weather Sealed | ✗ | ✓★ |
| Weight | 0.17 kg★ | 0.54 kg |
| Filter Thread | 58 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | STM★ | HLA (High-response Linear Actuator) |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 130 mm★ | 280 mm |
| Max Magnification | 1:6.66 | 1:4.8 |
Pros & Cons
Viltrox Air AF 9mm F2.8 E 9mm
- Strong social proof (91st percentile)91st %ile
- Strong macro (90th percentile)90th %ile
- Strong build (87th percentile)87th %ile
- Strong af (85th percentile)85th %ile
- Below average bokeh (30th percentile)
- Below average versatility (34th percentile)
Sigma Art 17-40mm f/1.8 DC 40mm
- Strong user sentiment (98th percentile)98th %ile
- Strong optical (97th percentile)97th %ile
- Strong bokeh (96th percentile)96th %ile
- Strong aperture (94th percentile)94th %ile
Verdict
Scores 97 overall, wins 9 of 9 usage categories and 4 of 21 specs.